An analysis of unsteady highly turbulent swirling flow in a model vortex combustor

EC Fernandes, MV Heitor, SI Shtork - Experiments in Fluids, 2006 - Springer
This paper reports an experimental investigation of a non-reacting turbulent swirling flow in
a practical vortex combustor. The flow was examined for the conditions characteristic of the …

Instability mechanism in a swirl flow combustor: precession of vortex core and influence of density gradient

K Manoharan, S Hansford… - … Expo: Power for …, 2015 - asmedigitalcollection.asme.org
Combustion instability is a serious problem limiting the operating envelope of present day
gas turbine systems using a lean premixed combustion strategy. Gas turbine combustors …

Vortex breakdown types and global modes in swirling combustor flows with axial injection

S Terhaar, TG Reichel, C Schrödinger… - Journal of Propulsion …, 2015 - arc.aiaa.org
This paper presents the results of a combined experimental, numerical, and analytical study
of the occurrence of different vortex breakdown types and helical instabilities in realistic …

On the identification of helical instabilities in a reacting swirling flow

SI Shtork, NF Vieira, EC Fernandes - Fuel, 2008 - Elsevier
An experimental study of unsteady reacting flow in a lean premixed swirl-stabilized
combustor has been performed using a high speed camera, LDV, chemiluminescence and …

Effect of geometrical contraction on vortex breakdown of swirling turbulent flow in a model combustor

Y Wu, C Carlsson, R Szasz, L Peng, L Fuchs, XS Bai - Fuel, 2016 - Elsevier
Abstract Large Eddy Simulation (LES) studies of isothermal and incompressible turbulent
swirling flows in a model gas turbine combustion chamber geometry have been carried out …

Experimental and computational study of nonreacting vortex breakdown in a swirl-stabilized combustor

COU Umeh, Z Rusak, E Gutmark, R Villalva, DJ Cha - AIAA journal, 2010 - arc.aiaa.org
Nonreacting flow experiments are conducted in a swirl-stabilized combustor with several
configurations of a triple annular research swirler fuel injector. Particle imaging velocimetry …

Parametric study of vortex structures and their dynamics in swirl-stabilized combustion

AM Steinberg, CM Arndt, W Meier - Proceedings of the Combustion …, 2013 - Elsevier
The dynamics of major flow structures were studied in a gas turbine model combustor for
perfectly premixed swirl-stabilized flames under a variety of reacting and non-reacting …

A review of oscillation mechanisms and the role of the precessing vortex core (PVC) in swirl combustion systems

N Syred - Progress in Energy and Combustion Science, 2006 - Elsevier
This paper reviews the occurrence of the precessing vortex core (PVC) and other
instabilities, which occur in, swirl combustion systems whilst identifying mechanisms, which …

Key parameters governing the precessing vortex core in reacting flows: An experimental and analytical study

S Terhaar, K Oberleithner, CO Paschereit - Proceedings of the Combustion …, 2015 - Elsevier
This report deals with an experimental and analytical study of the occurrence of self-excited
hydrodynamic instabilities in swirling combustor flows. Different flow field types are …

Helical vortex core dynamics and flame interaction in turbulent premixed swirl combustion: A combined experimental and large eddy simulation investigation

S Taamallah, Y Dagan, N Chakroun… - Physics of …, 2019 - pubs.aip.org
In this study, a combined experimental and Large Eddy Simulation (LES) investigation is
performed to identify the vortical structures, their dynamics, and interaction with a turbulent …